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speed, container, temperature, and test time.
3.4 Running a Test
A viscosity test is started by pressing the Run button while viewing the Configure Viscosity Test screen. Live
measurement data will be displayed during the test. When the end condition is met, the final data will be displayed on
the DVPlus until the user presses a key. The following procedure outlines the general steps necessary for making a
viscosity measurement in a 600 mL low form Griffin beaker using the standard LV/RV/HA/HB spindles (61-64, 2-7).
•
Level the DVPlus Viscometer, remove any attached spindles, and perform AutoZero (AutoZero is only
necessary after power up).
•
Prepare the sample to be tested and transfer to the 600 mL low form Griffin beaker.
•
Attach the guard leg (LV and RV series). Attach the spindle to the lower shaft. Lift the shaft slightly,
holding it firmly with one hand while either affixing the spindle using the magnetic coupling or screwing
the spindle on with the other (NOTE: Left-handed threads). Avoid putting side thrust on the shaft.
•
Enter the spindle number into the DVPlus Viscometer by using the Spindle box.
•
Enter the speed of rotation by using the Speed box.
•
Select an end condition for the test using the End Condition box.
•
Select a QC Limits setting for the test by using the QC Limits box.
•
Insert and center the spindle in the test material. The spindle should be inserted into the immersion
groove located on the spindle shaft. Use the Laboratory Stand Clamp to adjust the height of the
Viscometer. With a disc-type spindle, it is sometimes necessary to tilt the spindle slightly while immersing
to avoid trapping air bubbles under the surface of the disc. You may find it more convenient to immerse
the spindle in this fashion before attaching it to the Viscometer.
•
To make a viscosity measurement, press the Run button. If using the "None" End Condition, allow time for
the indicated reading to stabilize. The time required for stabilization will depend on the speed at which the
Viscometer is running and the characteristics of the sample fluid. The live test data shows on the touch
screen display. The Bar at the top of the screen is a torque meter. If the torque exceeds 100%, the bar will
turn red to alert the operator of a potential problem. Figure 3.4.1
•
When the end condition is reached, the motor will stop, and the measurement result will be displayed.
Figure 3.4.2
If using the "None" End Condition, the test can be stopped by pressing the Stop button. Record the reading and
relevant test parameters.
M21-400 REV.1.1
Figure 3-4.1
D V P L U S D I G I TA L V I S C O M E T E R - O P E R AT I O N A L M A N U A L
Figure 3-4.2
Figure 3-4.3
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